diff options
| -rw-r--r-- | gdb/dwarf2/read.c | 4 | ||||
| -rw-r--r-- | gdb/testsuite/gdb.dwarf2/debug-names-missing-cu.exp | 80 |
2 files changed, 83 insertions, 1 deletions
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index 84faeb4..6c6ca96 100644 --- a/gdb/dwarf2/read.c +++ b/gdb/dwarf2/read.c @@ -4655,7 +4655,9 @@ create_cus_from_debug_names_list (dwarf2_per_bfd *per_bfd, " ignoring .debug_names.")); return false; } - const ULONGEST length = sect_off_next - sect_off_prev; + /* Note: we're not using length = sect_off_next - sect_off_prev, + to gracefully handle an incomplete CU list. */ + const ULONGEST length = 0; dwarf2_per_cu_data_up per_cu = create_cu_from_index_list (per_bfd, §ion, is_dwz, sect_off_prev, length); diff --git a/gdb/testsuite/gdb.dwarf2/debug-names-missing-cu.exp b/gdb/testsuite/gdb.dwarf2/debug-names-missing-cu.exp new file mode 100644 index 0000000..f70debd --- /dev/null +++ b/gdb/testsuite/gdb.dwarf2/debug-names-missing-cu.exp @@ -0,0 +1,80 @@ +# Copyright 2022 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +load_lib dwarf.exp + +# This test can only be run on targets which support DWARF-2 and use gas. +if {![dwarf2_support]} { + return 0 +} + +standard_testfile _start.c debug-names.S + +set func_info_vars \ + [get_func_info _start [list debug additional_flags=-nostartfiles]] + +# Create the DWARF. +set asm_file [standard_output_file $srcfile2] +Dwarf::assemble { + filename $asm_file + add_dummy_cus 0 +} { + global func_info_vars + foreach var $func_info_vars { + global $var + } + + cu { label cu_label } { + compile_unit {{language @DW_LANG_C}} { + subprogram { + {DW_AT_name _start} + {DW_AT_low_pc $_start_start DW_FORM_addr} + {DW_AT_high_pc $_start_end DW_FORM_addr} + } + base_type { + {name int} + {byte_size 4 sdata} + {encoding @DW_ATE_signed} + } + } + } + + # This CU is missing from the cu list in .debug_names. + cu {} { + } + + debug_names {} { + cu cu_label + name _start subprogram cu_label 0xEDDB6232 + name int base_type cu_label 0xB888030 + } +} + +if [prepare_for_testing "failed to prepare" $testfile "${asm_file} ${srcfile}" \ + [list additional_flags=-nostartfiles]] { + return -1 +} + +# Verify that .debug_names section is not ignored. +set index [have_index $binfile] +gdb_assert { [string equal $index "debug_names"] } ".debug_names used" + +# Verify that initially no symtab is expanded. +gdb_test_no_output "maint info symtabs" + +# Verify that _start is found in the debuginfo, rather than in the minimal +# symbols, which would result instead in: +# $1 = {<text variable, no debug info>} $hex <_start> +gdb_test "print _start" " = {void \\(\\)} $hex <_start>" |